/**
 * Copyright (c) 2010, Casey Lai
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 * 
 * Redistributions of source code must retain the above copyright notice,
 * this list of conditions and the following disclaimer.
 * 
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation and/or
 * other materials provided with the distribution.
 * 
 * Neither the name of the Cheetah Group nor the names of its contributors may be
 * used to endorse or promote products derived from this software without specific
 * prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
 * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
 * OF SUCH DAMAGE.
 */

package org.cheetahworkflow.designer.action;

import java.util.ArrayList;
import java.util.List;

import org.cheetahworkflow.designer.Activator;
import org.cheetahworkflow.designer.ui.WorkflowChartEditor;
import org.cheetahworkflow.designer.ui.xmleditor.XMLEditor;
import org.cheetahworkflow.designer.utils.XMLVerifier;
import org.eclipse.jface.action.Action;
import org.eclipse.jface.dialogs.MessageDialog;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.ui.IEditorPart;
import org.xml.sax.ErrorHandler;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;


public class VerifyAction extends Action {
	
	private MultiPageEditorContributor contributor;
	
	public VerifyAction(MultiPageEditorContributor contributor) {
		this.contributor = contributor;
		setText("Verify");
		setToolTipText("Verify Current Workflow Chart");
		setImageDescriptor(ImageDescriptor.createFromFile(Activator.class, "/icons/verify.png"));
	}

	@Override
	public void run() {
		IEditorPart editorPart = contributor.getActivePage();
		String xml = null;
		if (editorPart instanceof WorkflowChartEditor) {
			xml = ((WorkflowChartEditor) editorPart).serialize();
		} else if (editorPart instanceof XMLEditor) {
			xml = ((XMLEditor) editorPart).getText();
		}
		if (xml != null) {
			List<String> messages = verify(xml);
			if (messages.size() == 0) {
				MessageDialog.openInformation(null, "Verification Pass", "No found any error or warning.");
			} else {
				StringBuilder sb = new StringBuilder();
				for(String message: messages) {
					sb.append(message);
					sb.append("\n");
				}
				MessageDialog.openWarning(null, "Verification Fail", "Oops... some errors are found:\n\n" + sb);
			}
		}
	}
	
	private List<String> verify(String xml) {
		final List<String> messages = new ArrayList<String>();
		
		ErrorHandler handler = new ErrorHandler() {
			@Override
			public void error(SAXParseException e) throws SAXException {
				messages.add("error: " + e.getMessage() + " [row:" + e.getLineNumber() + ", column:" + e.getColumnNumber() + "]");
			}
			@Override
			public void fatalError(SAXParseException e) throws SAXException {
				messages.add("fatal: " + e.getMessage() + " [row:" + e.getLineNumber() + ", column:" + e.getColumnNumber() + "]");
			}
			@Override
			public void warning(SAXParseException e) throws SAXException {
				messages.add("warning: " + e.getMessage() + " [row:" + e.getLineNumber() + ", column:" + e.getColumnNumber() + "]");
			}
		};
		XMLVerifier.verify(handler, xml);
		
		return messages;
	}
}
